Warp stop mechanism



May 2s,- 1929.

c. D. BROWN WARP STOP MECHANISM F'ild May 8, 1928 TTORNEY Patented May 2s, 1929.

yfumT-ED1STATE-s,

CARL DQBROWN, 'or HorEnAnn,y MnssAeHsE'rTs Assiettes iro.l ibrifz'iiiiinl c onroniil.

"rIoN, OE'HOPEDALE, MASSACHUSETTS, A-yCORPORATION'creanme..

- wARPTsTor MEoHANrsM.

i implication fuea May, 1928-v 'Se'fial N0-'276,046- i y This invention relates vto Warpstop mechvanisms for looms and-1s more particularly d1-V V rected to Warp stop mechanisms of the'transversely movable toothed detector bar type and means for supporting and bracing theftmns-f y 'y bracket or support v1t yin theupper edge porii versely extending elements thereof. Y In Warp stop'me'chanisms of the above gen-l n eral type there are now generally employed a fixed toothedd'etector bar and a transversely movable toothed. detector bar Which are passed through drop Wires normally vvsup-y ported by the Warp threads during Weaving;

Itis desirable that the transversely extending J toothed' detector barsshall ybe of light construction and readily removable frein-the loom' to permit change of Warp; Wherc theV detectorbars areof considerablelength and are of light construction. theyarefliable to be bent or deiiected from their straight transversely extending position during .the Weaving operation, and one of the objects ofthe present invention is to provide a bridge construction to maintain the toothed detector bars fromdistortion during Weavingv and at the same time to permit unobstructedA removal ofsuch transversely extending toothed i deto be changed'. i

tector bars from the loom'lvvhen the tvarp is l sockets along its upperedge'- invvhieh the theirnuppe'r toothed vedges and from'vvhich,v

toothed detector bars `may be supported below without.; manipulation of any'part connected .tothe-bridge member', their removal rmay be :effected Without disturbance of the bridge y 'Inember' or parts associatedl th'erevvith.v

The presentr inventionfis 'an improvement upon the Warp stop mechanism vshovvn andA described. in 'the DavisA and ohnsonlatent;y No. .1,538,625,; dated May v19,11925, and the novel Vfeatures thereof will best be made clear from the following descriptionand the accompanying drawingsgof' onel good form thereof. f W v In the drawings:lf

Fig. 1 lis vaside elevation of a Vv varp Ystop y i mechanism of the general type shown in the av bridge member is provided having'open y is anenlarged section ontheline i y l n Y y 'f lof the toothed detector barsWhile atthe same Fig. 4 is a plan view showing more parel' ticula'rly. the bridge 4member in :association tectorbars. Y y y l Moui'lted.ateach side ofthe loom isf-a tion 2 of which the fixed detector barsBja-rev mounted. l The Axed detector ba-rs' 3 are'provided With guideways' extending :longitudi'` nally thereof for the lreceptionoffthe transl'V versely movable detector bars thaving teeth l 5 extending from their upper' edges, and connested With each'of vthe transversely movable with the transversely movabletoothed de s.

detectorbars isfl a linky 6g pivotallyconnected f` at 7 to .an associated 'actuator-'8.2; Thev ac tuators 8, of which there may be any suitable number in'ac'cordance with the' numberof lative relation, as 'indicated inFig.' y1.` v The rockers -9lare rn ')`ur"1t'eduponv a rock shaft Y12 which is givenfrocking movement by an arm 13 actuated from a going part ofthe' lo'o'my'las, forinstance, the lower or' cam shaft, .vb'ya'n' arm14. 3 y' Each of the 'actuators 8 is provided with avstop` finger 15 which restsup'on afpivotally mounted arm 16. --Engagedfvsfith the lunder portion ofthe arm 16 is afplungerflS t'ssocif"v H ated Y with al flexible sheathedwire '19( through which loom stoppage may beeffected upon-- longitudinal movement of the sheathedfwire.

These parts and thedr'op Wires 20 mounted l upon the detector'bars"byymeans of slots'lin the upper portions `of the` drop `Wires, aspindicate'd in Fig. lgmay all be'of thesamegenf eral type or character as more fullyfdescribed in the DavisA and Johnson patent.

side of theV floomjar'efthe 'drop Wire separator bars 21', and such separator bars are vp"rolper1y engaged'with the'side.bracketsI f.

` .'As hereinbefore indicatedg'it is desirable at l'f times to remove the-fixedy andmovab'letoothed Warp liii-the loom to be 'chan,f ged, and? to' yeffect' this lresult of the unobstructed vremoval timeV `suppertingj'and bracing said :detectorv barsbettveen gtheir'end'portionsg'the present p invention prbvides'a brace or: bridge mem-$110v l Extending between*` the brackets y i Y detector bars `andthe ydrop{wires'assolciated 'i therewith, a condition which arises. When the ber 22-.having'open-'slots or `sockets 23 its upper edge, lso that the tootliedpoitionsof' the detector barsare above the upper edge of the .bridgel or bracingvmember 22, as more clearly indicated in Fig. 2.

Y The bri lge 'member 22 is likewise provided 'Y with open sockets 24-alongits lower edge y which embrace the drop wire separator bars 21, as more clearly indicated in Fig. 2, 'and a single clamping member is provided beloW theV separator bars forholding tliebiidge vmemberV 22- in its associated relation ,with

thetransverselyextending toothed detector part of the bridge member. I'

f bars, so that the latter and their .seriesof drop wires may bevreadily removed without obstruction and without manipulation `of any `The clamping member for effecting the above results consists of an arm 25 pivotally mounted fat 26 vto the downwardly extending portion of the bridge member 22, andsuch lclamping member isprovided with open i' sockets' 27 and 28 into which the lowerzedge portions Vof Vthe end separator members, 21

may .be engaged.V The sockets '27 and V23 in tlie'bridge member are of sucli depthV that whenthe `clamp 25;.isin its clampingposition, as indicated byafull lines in' Fig. 2,'the

i' r loweredge portions 29 of,thejendfseparator bars yare clamped therein, thereby maintain- `ing the clamping member 25 in position rela* tive to the transversely extending members of the warp stop. mechanism, V and effectively preventing any lateralor bending.movement ofthe end separating members, l n

Pivotally'connected to the clamping mem- A Yber`25 atl30 is the securing bolt 31,-and as i cated inzFig.k 2.V

.50' Y i screwed to `its clamping position, `the .lower bars and separator-bars.;

leo

a further means of aligning the bridge mem-l ber-22 in associated relation with the'transversely lmovable ldetector bars and .separator v bars, the bridge member 22 is provided withV Y laterallyextending lugs 32 in which the bolt 31 rests when inoperative positiom as indi.

-Above` .thelugs 32 member' 22 j isp'rovidedfwith `theoutwardly extending Llugs33 which embrace tlie .upper `endofi the bolt 31, and threadedto the upper endv of the bolt isV the winged-nut ,34, the 'construction being suchtliratvwhen the winged nutl34: is

clamping member 25 'willsec'urely hold `the bridge member and associatedvparts in proper relation foreffecting itsdesiredfunction, and

` the lower lugs32actto `align the bridge member 22 y in transverse `relation to the detector bear Yuponftliel outer surface of the` oppo-` site lseparatorbars 21,V thereby co-acting with .the lugs 32 and clamping boltto maintain the bridge. member ini properltransvelfse` posi ,K

Y The'innervedge portionsf35A of the lowerV 'lugs 32 bearupontlie sidefofthe end Sepa- 'rater bar 2 1, and similarly atthe opposite side Aof the bridge the f laterally extending lugs tion relative vto thedetector vand separator `From the'construction described` as one good practical embodiment of the present invention it will be apparent'that a' simple and i eective means isprovided'forl supporting and bracing tlie` transversely movablel and 7 fixedtoothed detectorbai's which may be readily removed romtlie Warprcstop mechanism( along with the drop'wires without obstruction of any overlyingpara sotliat without manipulating' theV parts of the bridgev mem-v ber, the warpoi tlieloom vmay. be readily .taken therefrom along vwith the movable and '.xed detectorbarsduring the change of warp,v and it will also be apparent thatjtlie trans- Y verse alignment ,ot thebridge memberis insured by the lugs 32 'and oppositefpro]ec-.- j

tions 35 and 36,.'so that when the bridge inem:-`

ber is in place it will be aligned accurately in transverse relation to tlie iixedand movc able detector bars and separator bars: j .y

Y. The! present invention-provides d asimple c and eective means' for bracing and snp-..1v

porting the transversely extending fixed' and movable Adetector. bars Yfor unobstructed ref moval from the loom and i'or supporting and bracing the separatorbars'for the l drop wires. Y l/Vhat is'claimedis:

1. In a warp stop; mechanism. looms7 `the combination of transversely Y movable;

toothed detector bars, fixed detector bars sup-k porting the transversely movable detector bars, a plurality of dropwires through which the detector barspassfspacing bars for the drop wires, abridge member having open Vstockets :tormedin itsupperv edge to receivel and support the detector bars and constructed. to lioldthe bars against twisting'cor' turningmovement while-permitting unobstructed removal ofthe detectorbars therefronnand open sockets its lower edge to receive the spacing bars, anda .single clamping member havingjopenwsockets for engaging the end grooves for holding and guiding vthe "movable ing open socketsto receive and support the detector'bars andgconstructed to hold the bars from twisting or turningwhile .permit` ting unobstructed removal ot*l the detector Y bars and Vdrop wires,V bolt receiving lugs eX,-

,tending fromV the upper Aand the lower part of thebridge memberto vhold thesecuring bolt fromA moving laterally7 spacing bars; a single clamping member below the' spacing bars,- and l fa securing boltengaging the lugs'of the bridge member for securing the bridge i'nemberl and pclampingmember in place;

3. In a warp stop mechanism for l i `om"s,7tl iey iso f series'of drop wires through which the two" lbars extend, 'drop wire separator bars, av bridge member having open slots in its upper p edge for supporting and bracing the ,detector-f combination of transversely movable toothed detector bars, lixed detector guidebars, a

- and bracing the separator bars, a singleclamp member for holding the bridge member clamped lto the separator bars andhaving an open socket at each end for embracing the end members or' the separator bars, and a screw kbolt secured to the single clamp member and engaging the bridge member.

4. In a warp stop mechanism for looms, the combination of transversely movable toothed detector bars, fixed detectorV guide bars, a

series of drop wires through which the two4 bars extend, drop wire separator bars, a

; bridge member havingopen slots in its upper edge :for supporting and bracing the detector 'bars below their toothed edges so that the bars are held from twisting or turning while` permitting unobstructed upward removal of said barsV and drop wires, and also having slots in itsr loweredge for supporting land `bracing the separator bars, va slnglerclamp Vmember in place. y Y Y v y In testimony whereof, I have signed my-v name tot-his specification. 1

c CARL 7D; BROWN. Y

member for holding the bridge member l -l clamped to the separatorbarsand having an Aopen soclret at each end for embracing the end members of'V the separator bars, a screw boltv secured to the single clamp member andengaging the bridge member, and aligning lugsy extending laterally from each end portion of the bridge member for resting againstVv the end separator bars to insure proper alignment Y of the bridge member. ,Y

y 5. In awarp stop mechanism for looms, the i combination oftransversely movable detector bars, fixed detector ybars having grooves for yholding and guidingthe movable detector bars7 a plurality ofdrop wires lstrung upon vthe detectorbars, a' bridgev member having I open sockets to snugly yreceive and support the detector barsand permitting unobstructed removal ofthe detectorv bars and drop wires, bolt receiving projections.extendingffrom an end of the bridge member and adapted to holdl i i the bolt irom'moving laterally ofthe bridge member, spacing bars,`a single clamping member below the spacing bars and adapted* e to exert a gripping action onv said bars',.jand Y Ia securing bolt engaging said lprojections for securmg'the` bridge member and clamping j a 60.V v l 

